Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 2 - Atoms, Molecules, and Ions - Exercises - Page 76: 2.56


Row one: 15 protons, 16 neutrons, 18 electrons, 3- charge. Row two: Symbol: 79 Se 2-, 36 electrons. Row three: Symbol: 119 Sn 4+, 4+ charge. Row four: Symbol: 197 Au 3+, 79 protons.

Work Step by Step

Calculate mass number in symbol by adding protons and neutrons, proton number translates to atomic number on periodic table which gives you the element, net charge is positive if there are more protons than electrons and negative if there are more electrons than protons.
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